Ranar Fluorescent Screen Exposure Units

The XPO-series screen printing exposure units, designed for startup t-shirt printing shops on a budget. There are three models, XPO-2426, XPO-2331, and the XPO-2848. Expose or burn images onto photo emulsions with high output UV Fluorescent lights, with accurate detail. Produce multi-color silk screen printed designs with fine lines or halftones used in four color process with quality film positives. Exposing dual cure, diazo and photopolymers emulsions, plus capillary films are easily done. All of these are commonly used in the textile, graphics, and ad specialty printing industries.

The Ranar XPO-series screen exposure units have a rigid tubular frame with holes in sides where the vacuum draws air from the exposure area. This vacuum frame has a rubber blanket that raises and lowers with gas shocks for easy access. A fast vacuum draws down the neoprene rubber blanket to the clear glass and creates perfect contact between your film positive and screen for clean crisp resolution. An accurate programmable digital timer controls exposure times. We use energy efficient electronic ballasts and unfiltered ultraviolet black light bulbs with 320 nanometers in our screen exposure units. With a flip of a switch the vacuum and ultraviolet lights can be used manually or automatically.

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Screen Coating & Exposure Tips

After properly prepping the screen mesh and drying it, use an aluminum scoop coater to apply an even coat of liquid emulsion which is light sensitive.

This must be done in a dark room or with subdued light. The use of a yellow or red light is helpful. Store your screen frame in a dark dry location prior to use as not to expose the emulsion to light.

Before using, have your art ready to go on the screen exposure unit. Place the film positive (make sure you have dark film positive) on the glass at the desired location. Then lower the screen frame on top. Set the timer and start the exposing of your design. The black lights will cure the areas except where the art is. The design blocks the light and prevents the emulsion from hardening.

Typical exposure times to be expected with photopolymer emulsion:
Block letters 1.5 minutes,
Halftones 30-50 seconds

Once you have exposed the emulsion you need to rinse out the unexposed emulsion. Wash out your design using a pressure nozzle and water. Be careful not to wash out your design. A washout booth with back lighting is helpful in this case. Note: do not rinse screen in the sun or direct light as it will harden your design and will not wash out.

Ranar makes its own professional screen exposures units in the USA to insure quality. The entry level XPO-2426 with (8) 20 watt bulbs is perfect for the small silk screening shop using standard 20"x 24" screen frames for manual screen printing presses. The XPO-2331 with (10) 20 watt bulbs can handle a 23"x 31" inch frame which is standard on automatic screen printing presses. The extra large XPO-2848 with (8) 40 watts bulbs can handle (2) 20"x 24" or (1) 23"x 31" or (1) large over size screen frame 28"x 48" used for all overprints and textile printing.

Vacuum Screen Exposure Unit Features :

• Black light fluorescent bulbs (320 nanometers)
• Adjustable Exposure times
• Digital timer
• Auto shut off
• Instant Draw Down Vacuum
• Neoprene Rubber Vacuum Blanket
  (fabric on one side for durability)
• Gas Shock Assisted vacuum frame
• Manual/Auto Mode
• Instant Start Electronic Ballast
• Energy efficient
• 1 yr warranty parts only
  (Excludes Blanket & Glass)
• Made in the USA.